Steam-chest.



H. II; BAUIvIG/IIIN.

STEAM CHESIT. APPLICATION FILED Nov. s0. 1915.

Patented Apr. 3, 1917.

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HANS H. BAUMGARN, OF LEMMON, SOUTH DAKOTA.

' 5 kins and State of South Dakota, have invented certain new and useful Improvements in Steam-Chests, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a steam chest, and has for its object the production of a simple and efficient steam chest and valve for use in connection therewith.

Another object of this invention is the production of a simple and efficient valve mechanism for controlling the supply and exhaust of steam to and from the cylinders of the engine.

With these and other objects in view this invention consists of certain novel combinations, constructions, and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings Figure 1 is a longitudinal section through the cylinder and steam chest.

Fig. 2 is a section taken on line 2-2 of Fi 1.

Fig. 3 is a front elevation of the cylinder, the steam chest being removed therefrom.

Fig. 4 is a section taken on line .4 4 of Fi Fig. ,5 is a plan view of the inner face of the sliding steam control valve.

By referring to the drawings, itwill be seen that a cylinder 7 is employed within which cylinder piston heads 14 and 21 work. These piston heads 14 and 21 are carried by the piston rods 13 and 20respectively. A suitable packing. member 15 is carried by eachcylinder head 16 through which the piston rods 13 and 20 pass, the packing members 15 being held upon the cylinder heads 16 by means of the bolts 17.

The cylinder .7 isprovided with a centrally arranged passageway 28 and a plurality of ports 29, one port being located near each end of the cylinder 7. A channel 30 extends longitudinally of the cylinder 7 50 and extends toward the center .of the cyl* inder and communicates with the ports 29.

Each of the channels 30 also communicates with a port 3l formed in the cylinder 7.

A steam chest 32 is detachably secured to 55 the cylinder 7, and this steam chest 32 comprises inner and outer portions, the inner Specification of Letters Patent.

STEAM-CHEST.

Patented Apr. 3, 19017.

Application led November 30, 1915. Serial No. 64,354.

portions and outer portions being held together by means of the connecting plates 33. Bolts 34 pass through the plates 33 and through therespective portions of the steam chest for firmly holding the same together. The steam chest 32 also supports a top plate 35 which constitutes a sealing member for the top of the steam chest. The plate 35 is provided with an inlet port 36, to which a steam supply pipe is adapted to be connected. The port 36 formed in the plate 35 communicates with a passageway 40 formed in the outer portion or section of the steam chest, and this passageway 40 is provided with a pair of side channels 41, which do communicate with the ports 31 for supplying steam through the channels 30 and to the ports 29 and into the respective ends of the cylinder 7. A centrally located port 42 is also formed in the steam chest 32 and communicates with the centrally located port 38 formed in the cylinder 7.

A slide valve 43 is mounted between the inner and outer portions of the steam chest, andl is preferably formed wedge-shape in cross section, tapering toward the lower end thereof. rlhis slide valve 43 is provided with a steam inlet port 44 near one end, and a pair of auxiliary inlet ports 45 formed near the opposite end. An exhaust port 46 is formed near the inner end of the slide valve 43, and a plurality of auxiliary exhaust ports 47 are formed in the slide valve 43 between the primary inlet port 44 and the auxiliary inletports 45. The ports 44 and 45 extend entirely through the valve 43, whereas the ports 46 and 47 constitute merely channel portions extending only a portionof the way through the valve 46 and communicate with the lower end or lower cut-out portion 48 formed in the lower end of the valve 43. It, of course, should be understood that suitable packing plates 49 are employed upon the steam chest 32 as illustrated, and an operating rod 50 is connected to the slide valve 43, and this rod 50 carries a band ring 51, which band ring 51 fits over an eccentric 52 formed upon the shaft 3.

A pocket 53 is formed in the lower end of the steam chest 32, and the lower end of this pocket 53 is normally closed by means of a plate 54, upon which is supported a plurality of discharge valves or cocks 55 to permit the exhaust steam to pass out therethrough, and also to permit the same to be drained when so desired. .A steam `discharge aperture 56, however, is employed in such a position as to constitute the main drain for the steam and exhaust port in the steam chest.

By carefully considering Fig. 1 it will be seen thaty the valve 43, when in the position shown in Fig. 1, will cause the steam to pass from the passageway 40 through the ports 41 and be discharged out through the ports 29 intothe opposite ends of thek cylinder 7, thereby causing the pistons 21 and 14 to be moved toward each other. Upon the next movement of the engine, the valve 48 will be moved inwardly, thereby causing the ports 46 and one of the ports 47 to communicate with the ports 4l and permit the steam to exhaust down through the port 46 and one ofthe ports` 47 and be discharged out through the exhaust port 56. When the valve 48 is in this position, the live steam will pass from the passageway 40 through the port 42, through the central supply port 45, through the port 2S and into the Central portionof the cylinder 7 and cause the piston heads 14 and 21 to move apart. Upon the second movement of the valve 43, however, the same will return to the position shown in Fig. 1, and the exhaust steam may then pass out through thel port 48, through the port 42, through the inner passage 47, and be discharged out through the exhaust port 56.

It should be understood that by arranging the valve 43 in the manner as illustrated, and providing the same is wedge-shape in cross section, this valve will constitute a tight joint and prevent the escape of steam from between the side walls of the valve 43 and the inner and outer portions of the steam chest 32. j Having thus described the invention what is claimed as new, is

1. A steam chest of the class described comprising a casing, an elongated valve slidably mounted within said steam chest being formed wedge-shape in cross section yand tapering toward the lower end thereof,

said valve provided with a plurality of transversely extending apertures, said valve provided with a plurality of discharge ports formed upon one side thereof, said valve also provided with a pocket at the lower end thereof, said discharge ports communicatopies of this patent may be obtained for ing with said pockets, and the lower end of said steam chest being provided with a discharge steam outlet.

2. A slide valve of the class described comprising a steam chest, an elongated valve slidably mounted within said steam chest and tapering toward its lower end for eausing said valve to at all times tightly seat within said s'team chest, said valve provided with ports formed therein for controlling the admission and discharge of exhaust steam to and from said steam chest, and means formed in the lower end of said steam chest for conveying steam therefrom after the steam has passed through said slide valve.

3. A slide valve of the class described comprising a steam chest, said steam chest comprising an inner and outer portion, means for connecting said inner and outer portions together, a top plate Carried by said outer portion and being removably secured thereto, said top plate provided with an inlet port, said outer portion provided with a steam inlet passage-way, said steam inlet passage-way provided with a plurality of side channels, said outer portion provided with a centrally located port, a slide vvalve mounted within said steam chest, said slide valve being wedge-shape in cross seetion and tapering toward the lower edge thereof, said valve provided with a plurality of steam inlet ports near one end, said valve also provided with a pair of auxiliary inlet ports near the opposite end, said valve also provided with an exhaust port formed near the end of said slide valve, and also being provided with a plurality of auxiliary exhaust ports formed in the slide valve between the primary inlet ports and the auxiliary inlet ports, said inlet ports extending entirely through said valve, said exhaust ports constituting channels in one face of said valve and communicating with the lower end of said valve, said valve provided with a cut-out portion upon the lower end thereof for communicating with said exhaust ports, and means for conveying the exhaust from said lower end of said valve.

In testimony whereof I hereunto ailix my signature.

HANS H. BAUMGARN.

ive cents each, by addressing the Commissioner of Patents, Washington, D. C. 

